* I am not the original author of this plugin, I just upgraded the code and fixed an issue with the "convertummalquratogregorian" not converting hijri dates past the year 1451 hijri (around 2029 Gregorian)

Um Al Qura Calendar Conversion

Provides users with a set of functions to convert between Gregorian and Um Al Qura Islamic calendars

• appiandatetoumalquraconversionwithenglishname() - Converts Appian standard date object to Um Al Qura. The returned format contains the month name in English
• convertgregoriantoumalqurawitharabicmonth() = Converts Appian standard date object to Um Al Qura. The returned format contains the month name in Arabic.
• convertgregoriantoummalqura() - Converts standard date object to Um Al Qura date string.
• convertummalquratogregorian() - Converts Um Al Qura date to a standard date object.
• returnarabicislamicmonths() - Returns a list of Islamic months in Arabic.
• returnenglishmonthsnames() Returns a list of Islamic months in English.

link to Appian AppMarket plugin page